DE19914143A1 - Device and method for degassing plastics, in particular high-molecular polycarbonate solutions - Google Patents
Device and method for degassing plastics, in particular high-molecular polycarbonate solutionsInfo
- Publication number
- DE19914143A1 DE19914143A1 DE19914143A DE19914143A DE19914143A1 DE 19914143 A1 DE19914143 A1 DE 19914143A1 DE 19914143 A DE19914143 A DE 19914143A DE 19914143 A DE19914143 A DE 19914143A DE 19914143 A1 DE19914143 A1 DE 19914143A1
- Authority
- DE
- Germany
- Prior art keywords
- degassing
- extruder
- zone
- conveying direction
- opening
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Ceased
Links
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
- B29C48/25—Component parts, details or accessories; Auxiliary operations
- B29C48/78—Thermal treatment of the extrusion moulding material or of preformed parts or layers, e.g. by heating or cooling
- B29C48/80—Thermal treatment of the extrusion moulding material or of preformed parts or layers, e.g. by heating or cooling at the plasticising zone, e.g. by heating cylinders
- B29C48/83—Heating or cooling the cylinders
- B29C48/834—Cooling
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29B—PREPARATION OR PRETREATMENT OF THE MATERIAL TO BE SHAPED; MAKING GRANULES OR PREFORMS; RECOVERY OF PLASTICS OR OTHER CONSTITUENTS OF WASTE MATERIAL CONTAINING PLASTICS
- B29B7/00—Mixing; Kneading
- B29B7/30—Mixing; Kneading continuous, with mechanical mixing or kneading devices
- B29B7/34—Mixing; Kneading continuous, with mechanical mixing or kneading devices with movable mixing or kneading devices
- B29B7/38—Mixing; Kneading continuous, with mechanical mixing or kneading devices with movable mixing or kneading devices rotary
- B29B7/46—Mixing; Kneading continuous, with mechanical mixing or kneading devices with movable mixing or kneading devices rotary with more than one shaft
- B29B7/48—Mixing; Kneading continuous, with mechanical mixing or kneading devices with movable mixing or kneading devices rotary with more than one shaft with intermeshing devices, e.g. screws
- B29B7/487—Mixing; Kneading continuous, with mechanical mixing or kneading devices with movable mixing or kneading devices rotary with more than one shaft with intermeshing devices, e.g. screws with consecutive casings or screws, e.g. for feeding, discharging, mixing
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29B—PREPARATION OR PRETREATMENT OF THE MATERIAL TO BE SHAPED; MAKING GRANULES OR PREFORMS; RECOVERY OF PLASTICS OR OTHER CONSTITUENTS OF WASTE MATERIAL CONTAINING PLASTICS
- B29B7/00—Mixing; Kneading
- B29B7/80—Component parts, details or accessories; Auxiliary operations
- B29B7/82—Heating or cooling
- B29B7/826—Apparatus therefor
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29B—PREPARATION OR PRETREATMENT OF THE MATERIAL TO BE SHAPED; MAKING GRANULES OR PREFORMS; RECOVERY OF PLASTICS OR OTHER CONSTITUENTS OF WASTE MATERIAL CONTAINING PLASTICS
- B29B7/00—Mixing; Kneading
- B29B7/80—Component parts, details or accessories; Auxiliary operations
- B29B7/84—Venting or degassing ; Removing liquids, e.g. by evaporating components
- B29B7/845—Venting, degassing or removing evaporated components in devices with rotary stirrers
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
- B29C48/25—Component parts, details or accessories; Auxiliary operations
- B29C48/36—Means for plasticising or homogenising the moulding material or forcing it through the nozzle or die
- B29C48/50—Details of extruders
- B29C48/76—Venting, drying means; Degassing means
- B29C48/762—Vapour stripping
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
- B29C48/25—Component parts, details or accessories; Auxiliary operations
- B29C48/36—Means for plasticising or homogenising the moulding material or forcing it through the nozzle or die
- B29C48/50—Details of extruders
- B29C48/76—Venting, drying means; Degassing means
- B29C48/765—Venting, drying means; Degassing means in the extruder apparatus
- B29C48/766—Venting, drying means; Degassing means in the extruder apparatus in screw extruders
- B29C48/767—Venting, drying means; Degassing means in the extruder apparatus in screw extruders through a degassing opening of a barrel
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
- B29C48/03—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor characterised by the shape of the extruded material at extrusion
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08G—MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
- C08G64/00—Macromolecular compounds obtained by reactions forming a carbonic ester link in the main chain of the macromolecule
- C08G64/40—Post-polymerisation treatment
- C08G64/406—Purifying; Drying
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Processing And Handling Of Plastics And Other Materials For Molding In General (AREA)
- Extrusion Moulding Of Plastics Or The Like (AREA)
- Polyesters Or Polycarbonates (AREA)
Abstract
Description
Die Erfindung betrifft eine Vorrichtung und ein Verfahren zum Entgasen von Kunst stoffen, insbesondere von hochmolekularen Polycarbonatlösungen, mit einem Dop pelwellenextruder, der gleichsinnig drehende, miteinander kämmende Wellen auf weist.The invention relates to a device and a method for degassing art substances, especially high molecular weight polycarbonate solutions, with a dop pel shaft extruder, the co-rotating, intermeshing shafts points.
Infolge des gestiegenen Umweltbewußtseins werden in der Kunststoffverarbeitung steigende Anforderungen bezüglich der Entfernung flüchtiger Komponenten aus Kunststoffen gestellt. Dies gilt insbesondere hinsichtlich des Einsatzes von Kunst stoffen im Lebensmittelbereich. Die flüchtigen Komponenten dürfen im extrudierten Kunststoff meist nicht über 0,2 Gew.-% liegen und müssen zur Verbesserung der Produktqualität, insbesondere der optischen Eigenschaften, entzogen werden. Dies gilt insbesondere für Produkte aus hochmolekularen Polycarbonatlösungen mit Chlorbenzol und Methylenchlorid als flüchtigen Komponenten. Das Entfernen flüchtiger Komponenten aus Polymeren wird in der Kunststofftechnik als Entgasung bezeichnet. Zum Entgasen werden unterschiedliche Vorrichtungen verwendet, insbe sondere Ein- und Zweischneckenextruder.As a result of increased environmental awareness in plastics processing increasing requirements regarding the removal of volatile components Plastics. This applies in particular to the use of art substances in the food sector. The volatile components may be extruded Plastic usually does not exceed 0.2% by weight and must be used to improve the Product quality, especially the optical properties, are withdrawn. This applies in particular to products made from high molecular weight polycarbonate solutions Chlorobenzene and methylene chloride as volatile components. The removal volatile components made of polymers is used in plastics technology as degassing designated. Different devices are used for degassing, in particular special single and twin screw extruders.
Bei der Entgasung mittels Ein- und Zweischneckenextrudern wird die Vorwärts- und Rückwärtsentgasung sowie die ein- und mehrfache Entgasung unterschieden. Bei der Vorwärtsentgasung ist die Entgasungsöffnung des Extruders in Förderrichtung der Schnecke hinter dem Einzug des Extruders angeordnet, während sie bei der Rück wärtsentgasung in Förderrichtung der Schnecke vor dem Einzug angeordnet ist. Auch werden Entgasungsextruder verwendet, bei denen sowohl eine Vorwärts- als auch eine Rückwärtsentgasung erfolgt. Je nach angestrebtem Restgehalt an flüchtigen Komponenten wird eine einstufige oder mehrstufige Entgasung durchgeführt. Die Anzahl der Entgasungsstufen kann allerdings nicht beliebig erhöht werden, da hierdurch die Kosten der Produktherstellung steigen und häufig auch die Produkt qualität abnimmt. Die Produktqualität hängt dabei insbesondere von der Prozeß temperatur bzw. dem Temperaturanstieg sowie der Verweilzeit des zu entgasenden Kunststoffs innerhalb des Extruders ab.When degassing using single and twin screw extruders, the forward and A distinction is made between reverse degassing and single and multiple degassing. In the Forward degassing is the degassing opening of the extruder in the conveying direction Snail arranged behind the feed of the extruder, while at the back degassing is arranged in the conveying direction of the screw before the feed. Also degassing extruders are used, in which both a forward and backward degassing takes place. Depending on the desired residual volatile content Components a single-stage or multi-stage degassing is carried out. The However, the number of degassing stages cannot be increased as desired this increases the cost of product manufacture and often the product quality decreases. The product quality depends in particular on the process temperature or the temperature increase and the residence time of the gas to be degassed Plastic inside the extruder.
Aufgabe der Erfindung ist es, eine Vorrichtung und ein Verfahren der eingangs ge nannten Art bereitzustellen, die zu einer wirtschaftlichen Verbesserung der Produkt qualität führen, und zwar insbesondere die Herstellung von Polycarbonat mit beson ders hoher Transmission ermöglichen.The object of the invention is to provide a device and a method of ge to provide named type, which leads to an economic improvement of the product lead quality, especially the production of polycarbonate with special enable high transmission.
Diese Aufgabe wird erfindungsgemäß dadurch gelöst, daß die Wellen des Extruders in der Entgasungszone zweigängig und in dessen Druckaufbauzone dreigängig aus geführt sind und der Extruder ein L/D-Verhältnis kleiner/gleich 40 aufweist, wobei L für die jeweilige Schneckenlänge und D für den jeweiligen Schneckendurchmesser steht.This object is achieved in that the shafts of the extruder in the degassing zone two-way and in its pressure build-up zone three-way are guided and the extruder has an L / D ratio less than / equal to 40, where L for the respective screw length and D for the respective screw diameter stands.
Herkömmliche Entgasungsextruder ermöglichen zum Beispiel bei hochmolekularen Polycarbonat-Typen Transmissionen von 87 bis 88. Demgegenüber lassen sich mit der erfindungsgemäßen Vorrichtung bzw. dem entsprechenden Verfahren für diese Polycarbonat-Typen überraschenderweise Transmissionen von 88,5 bis 89,5 erzielen.Conventional degassing extruders allow, for example, high-molecular ones Polycarbonate types transmissions from 87 to 88. In contrast, with the device according to the invention and the corresponding method for this Polycarbonate types surprisingly achieve transmissions from 88.5 to 89.5.
Darüber hinaus können die Kosten der Produktherstellung reduziert werden, da der Extruder der erfindungsgemäßen Vorrichtung relativ kurz ausgeführt ist und sich damit der Platzbedarf und die Kosten der Vorrichtung entsprechend verringern.In addition, the cost of product manufacturing can be reduced because of the Extruder of the device according to the invention is relatively short and thus reducing the space requirement and the cost of the device accordingly.
Besonders hohe Trasmissionwerte wurden erzielt mit einem Doppelschnecken extruder, dessen L/D-Verhältnis im Bereich von 35 bis 40 liegt.Particularly high transmission values were achieved with a twin screw extruder whose L / D ratio is in the range of 35 to 40.
Zur Vermeidung temperaturbedingter Qualitätseinbußen ist es vorteilhaft, wenn der Extruder desweiteren eine eine Kühlzone definierende Kühleinrichtung aufweist. Auf diese Weise kann die Produktqualität positiv beeinflußt werden. Die Wellen des Extruders sind in der Kühlzone vorzugsweise dreigängig ausgeführt. To avoid temperature-related quality losses, it is advantageous if the Extruder also has a cooling device defining a cooling zone. On in this way the product quality can be influenced positively. The waves of the Extruders in the cooling zone are preferably three-course.
Nach einer anderen bevorzugten Ausgestaltung sind unmittelbar hinter der Einzugs öffnung des Extruders zwischen den Förderelementen der Wellen Knetelemente angeordnet. Die Knetelemente dienen dem Energieeintrag und insbesondere der Ver größerung der Entgasungsoberfläche.According to another preferred embodiment, are immediately behind the feeder Opening of the extruder between the conveying elements of the shafts. Kneading elements arranged. The kneading elements serve the energy input and in particular Ver enlargement of the degassing surface.
Eine hohe Entgasung läßt sich insbesondere erzielen, wenn gemäß einer weiteren Ausgestaltung der Extruder in Förderrichtung mehrere Entgasungszonen aufweist, an denen jeweils eine Absaugeinrichtung angeschlossen ist. Sehr gute Ergebnisse wurden mit einem Extruder erzielt, der hinter seiner Einzugsöffnung in Förder richtung drei Entgasungszonen aufweist, wobei an der der ersten Entgasungszone zugeordneten Entgasungsöffnung ein Absolutdruck im Bereich von 0,5 bis 1,5 bar, an der der zweiten Entgasungszone zugeordneten Entgasungsöffnung ein Absolut druck im Bereich von 0,03 bis 1,9 bar und an der der dritten Entgasungszone zuge ordneten Entgasungsöffnung ein Absolutdruck im Bereich von 0,001 bis 0,03 bar erzeugt wurde.A high degassing can be achieved in particular if according to another Design of the extruder in the conveying direction has several degassing zones which are each connected to a suction device. Very good results were achieved with an extruder that is in the conveyor behind its feed opening direction has three degassing zones, with that of the first degassing zone assigned an absolute pressure in the range from 0.5 to 1.5 bar, an absolute at the degassing opening assigned to the second degassing zone pressure in the range of 0.03 to 1.9 bar and at the third degassing zone arranged an absolute pressure in the range of 0.001 to 0.03 bar was generated.
Die Entgasung kann ferner mit einem die Entgasungsoberfläche vergrößernden Schleppmittel positiv beeinflußt werden. Bei dem erfindungsgemäßen Verfahren wird das Schleppmittel vorzugsweise in Förderrichtung zwischen einer zweiten und dritten Entgasungszone zugemischt. Als Schleppmittel kann vorzugsweise Stickstoff verwendet werden. Der zugeführte Stickstoffvolumenstrom sollte bei einer Wellen drehzahl kleiner/gleich 390 U/min vorzugsweise 2 bis 10 Nm3/h betragen.The degassing can also be positively influenced with an entraining agent which increases the degassing surface. In the method according to the invention, the entrainer is preferably mixed in between two and third degassing zones in the conveying direction. Nitrogen can preferably be used as entrainer. The supplied nitrogen volume flow should be at a shaft speed less than or equal to 390 rpm, preferably 2 to 10 Nm 3 / h.
Weitere bevorzugte und vorteilhafte Ausgestaltungen der Erfindung sind in den Unteransprüchen angegeben.Further preferred and advantageous embodiments of the invention are in the Subclaims specified.
Nachfolgend wird die Erfindung anhand einer ein Ausführungsbeispiel darstellenden Zeichnung näher erläutert. Die einzige Figur zeigt eine schematische Längsschnitt darstellung eines Doppelwellenextruders einer erfindungsgemäßen Vorrichtung. The invention is described below with reference to an exemplary embodiment Drawing explained in more detail. The single figure shows a schematic longitudinal section representation of a twin-screw extruder of a device according to the invention.
Der Doppelwellenextruder weist ein aus insgesamt acht Teilen zusammengesetztes Gehäuse auf, in welchem zwei gleichsinnig drehende, miteinander kämmende Wellen (nicht gezeigt) angeordnet sind. Der zu entgasende Kunststoff wird dem Ex truder über die im ersten Gehäuseteil 1 ausgebildete Einzugsöffnung 2 zugeführt. In Förderrichtung vor der Einzugsöffnung 2 ist eine Entgasungsöffnung 3 (Rückwärts entgasung) angeordnet. Die Antriebsenden der Wellen sind über eine Gleitringdich tung (nicht gezeigt) an der in der Figur linken Seite des ersten Gehäuseteils 2 nach außen geführt.The double-shaft extruder has a housing composed of a total of eight parts, in which two shafts (not shown) which rotate in the same direction and mesh with one another are arranged. The plastic to be degassed is fed to the ex-truder through the feed opening 2 formed in the first housing part 1 . A degassing opening 3 (reverse degassing) is arranged in the conveying direction in front of the feed opening 2 . The drive ends of the shafts are guided to the outside via a mechanical seal (not shown) on the left side of the first housing part 2 in the figure.
An das erste Gehäuseteil 1 schließt sich in Förderrichtung ein etwa gleichlanges zweites Gehäuseteil 4 an, das eine weitere Entgasungsöffnung 5 aufweist. Es folgt ein drittes, längeres Gehäuseteil 6, an das sich über ein viertes, relatives kurzes Ge häuseteil 7 ein fünftes Gehäuseteil 8 anschließt, dessen Länge derjenigen des dritten Gehäuseteils 6 entspricht. Das dritte und fünfte Gehäuseteil 6, 8 weisen jeweils gleichgroße Entgasungsöffnungen 9, 10 auf, die mehr als doppelt so lang wie die Entgasungsöffnung 5 des zweiten Gehäuseteils 4 sind. Die Entgasungsöffnungen 5, 9 und 10 sind an einer Absaugeinrichtung (nicht gezeigt) angeschlossen.In the conveying direction, the first housing part 1 is followed by a second housing part 4 of approximately the same length, which has a further degassing opening 5 . There follows a third, longer housing part 6 , to which a fifth housing part 8 is connected via a fourth, relatively short housing part 7 , the length of which corresponds to that of the third housing part 6 . The third and fifth housing parts 6 , 8 each have degassing openings 9 , 10 of the same size, which are more than twice as long as the degassing opening 5 of the second housing part 4 . The degassing openings 5 , 9 and 10 are connected to a suction device (not shown).
Das vierte Gehäuseteil 7 ist mit einem Anschluß 11 versehen, über den ein Schlepp mittel, vorzugsweise Stickstoff, zugemischt werden kann.The fourth housing part 7 is provided with a connection 11 through which a towing medium, preferably nitrogen, can be admixed.
Hinter dem fünften Gehäuseteil 8 folgen drei etwa gleichgroße Gehäuseteile 12, 13, 14, die eine Druckaufbauzone bilden, an deren Ende das entgaste Produkt aus dem Extruder austritt. Es ist zu erkennen, daß an dem sechsten Gehäuseteil 12 eine Anschlußöffnung 15 ausgebildet ist. Hieran kann ein Seitenextruder angeschlossen werden, über den dem entgasten Produkt Additive zugemischt werden können.Behind the fifth housing part 8 follow three housing parts 12 , 13 , 14 of approximately the same size, which form a pressure build-up zone, at the end of which the degassed product emerges from the extruder. It can be seen that a connection opening 15 is formed on the sixth housing part 12 . A side extruder can be connected to this, via which additives can be added to the degassed product.
Im Bereich dieser Druckaufbauzone weisen die Wellen ein dreigängiges Profil auf.In the area of this pressure build-up zone, the shafts have a three-start profile.
Unmittelbar hinter der Einzugsöffnung 2 sind zwischen den Förderelementen der Wellen Knetelemente angeordnet. Im Bereich der Gehäuseteile 1, 4, 6, 7 und 8 sind die Wellen zweigängig ausgebildet. Die zweigängigen und dreigängigen Wellen profile weisen dabei vorzugsweise unterschiedliche Steigungswinkel bzw. Steigungs richtungen auf.Kneading elements are arranged directly behind the feed opening 2 between the conveying elements of the shafts. In the area of the housing parts 1 , 4 , 6 , 7 and 8 , the shafts are designed with two gears. The two-course and three-course wave profiles preferably have different pitch angles or pitch directions.
Die erfindungsgemäße Vorrichtung wird derart betrieben, daß an der ersten Ent gasungsöffnung 3 ein Absolutdruck von 1 bis 2 bar, an der zweiten Entgasungs öffnung 5 ein Absolutdruck von 2,5 bis 1,5 bar, an der dritten Entgasungsöffnung 9 ein Absolutdruck von 0,03 bis 0,9 bar und an der vierten Entgasungsöffnung 10 ein Absolutdruck von 0,001 bis 0,03 bar herrscht.The inventive apparatus is operated such that at the first gasungsöffnung Ent 3, an absolute pressure of 1 to 2 bar, to the second degassing opening 5, an absolute pressure of 2.5 to 1.5 bar, at the third vent 9, an absolute pressure of 0, 03 to 0.9 bar and at the fourth degassing opening 10 there is an absolute pressure of 0.001 to 0.03 bar.
Der Doppelwellenextruder arbeitet vorzugsweise mit einer Drehzahl kleiner/gleich 390 U/min. Der zugeführte Stickstoffvolumenstrom beträgt vorzugsweise 2 bis 10 Nm3/h.The twin-screw extruder preferably operates at a speed of less than or equal to 390 rpm. The nitrogen volume flow supplied is preferably 2 to 10 Nm 3 / h.
Um temperaturbedingte Qualitätseinbußen zu verhindern, ist der Extruder mit einer Kühleinrichtung (nicht gezeigt) versehen. Die Kühleinrichtung ist vorzugsweise im Bereich der Gehäuseteile 12, 13, 14 ausgebildet.In order to prevent temperature-related quality losses, the extruder is provided with a cooling device (not shown). The cooling device is preferably formed in the area of the housing parts 12 , 13 , 14 .
Es hat sich gezeigt, daß mit einer derart konfigurierten Vorrichtung ein Polycarbonat mit besonders hoher Transmission herstellbar ist, nämlich Transmissionen von 88,5 bis 89,5 bei hochmolekularen (V-Zahl 1,33) Polycarbonat-Typen.It has been shown that with a device configured in this way, a polycarbonate can be produced with a particularly high transmission, namely transmissions of 88.5 up to 89.5 for high molecular weight (V number 1.33) polycarbonate types.
Claims (22)
Priority Applications (14)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE19914143A DE19914143A1 (en) | 1999-03-27 | 1999-03-27 | Device and method for degassing plastics, in particular high-molecular polycarbonate solutions |
TW089104458A TW548174B (en) | 1999-03-27 | 2000-03-13 | Apparatus and process for degassing plastic materials |
DE50001239T DE50001239D1 (en) | 1999-03-27 | 2000-03-14 | DEVICE AND METHOD FOR DEGASSING PLASTICS, ESPECIALLY HIGH MOLECULAR POLYCARBONATE SOLUTIONS |
KR1020017012257A KR20010108409A (en) | 1999-03-27 | 2000-03-14 | Device and Method for Degassing Plastics, Especially Polycarbonate Solutions of High Molecular Weight |
ES00914132T ES2192521T3 (en) | 1999-03-27 | 2000-03-14 | DEVICE AND PROCEDURE FOR THE DEGASIFICATION OF SYNTHETIC MATERIALS, IN SPECIAL SOLUTIONS OF ELEVATED MOLECULAR WEIGHT POLYCARBONATE. |
JP2000607807A JP4434497B2 (en) | 1999-03-27 | 2000-03-14 | Apparatus and method for degassing plastics, especially high molecular weight polycarbonate solutions |
IDW00200102307A ID30399A (en) | 1999-03-27 | 2000-03-14 | EQUIPMENT AND PROCESS FOR DISEGRATION OF PLASTIC MATERIALS, SPECIFICALLY OF MOLECUL-HIGH POLYCARBONATE SOLUTIONS |
US09/937,467 US6811294B1 (en) | 1999-03-27 | 2000-03-14 | Device and method for degassing plastics |
CN00805518A CN1119226C (en) | 1999-03-27 | 2000-03-14 | Device and method for degassing plastics, especially polycarbonate solutions of high molecular weight |
BR0009367-0A BR0009367A (en) | 1999-03-27 | 2000-03-14 | Device and process for degassing plastic materials, especially high molecular weight polycarbonate solutions |
HK02107112.6A HK1045665B (en) | 1999-03-27 | 2000-03-14 | Device and method for degassing plastics, especially polycarbonate solutions of high molecular weight |
EP00914132A EP1165302B1 (en) | 1999-03-27 | 2000-03-14 | Device and method for degassing plastics, especially polycarbonate solutions of high molecular weight |
PCT/EP2000/002240 WO2000058072A1 (en) | 1999-03-27 | 2000-03-14 | Device and method for degassing plastics, especially polycarbonate solutions of high molecular weight |
AU35557/00A AU3555700A (en) | 1999-03-27 | 2000-03-14 | Device and method for degassing plastics, especially polycarbonate solutions of high molecular weight |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE19914143A DE19914143A1 (en) | 1999-03-27 | 1999-03-27 | Device and method for degassing plastics, in particular high-molecular polycarbonate solutions |
Publications (1)
Publication Number | Publication Date |
---|---|
DE19914143A1 true DE19914143A1 (en) | 2000-09-28 |
Family
ID=7902777
Family Applications (2)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
DE19914143A Ceased DE19914143A1 (en) | 1999-03-27 | 1999-03-27 | Device and method for degassing plastics, in particular high-molecular polycarbonate solutions |
DE50001239T Expired - Lifetime DE50001239D1 (en) | 1999-03-27 | 2000-03-14 | DEVICE AND METHOD FOR DEGASSING PLASTICS, ESPECIALLY HIGH MOLECULAR POLYCARBONATE SOLUTIONS |
Family Applications After (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
DE50001239T Expired - Lifetime DE50001239D1 (en) | 1999-03-27 | 2000-03-14 | DEVICE AND METHOD FOR DEGASSING PLASTICS, ESPECIALLY HIGH MOLECULAR POLYCARBONATE SOLUTIONS |
Country Status (13)
Country | Link |
---|---|
US (1) | US6811294B1 (en) |
EP (1) | EP1165302B1 (en) |
JP (1) | JP4434497B2 (en) |
KR (1) | KR20010108409A (en) |
CN (1) | CN1119226C (en) |
AU (1) | AU3555700A (en) |
BR (1) | BR0009367A (en) |
DE (2) | DE19914143A1 (en) |
ES (1) | ES2192521T3 (en) |
HK (1) | HK1045665B (en) |
ID (1) | ID30399A (en) |
TW (1) | TW548174B (en) |
WO (1) | WO2000058072A1 (en) |
Families Citing this family (19)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US7123212B2 (en) * | 2000-12-22 | 2006-10-17 | Harman International Industries, Inc. | Information transmission and display method and system for a handheld computing device |
DE102004041689B4 (en) * | 2004-08-27 | 2010-02-11 | Kraussmaffei Berstorff Gmbh | Device for producing injection-molded parts |
DE102007029010A1 (en) * | 2006-08-26 | 2008-02-28 | Bayer Materialscience Ag | Method of compounding thermally-stable and -unstable polymers in screw extruder to produce low-volatile product, injects and extracts inert entrainment gas |
RU2542986C2 (en) | 2008-09-19 | 2015-02-27 | Ланксесс Интернасьональ Са | Method of obtaining polymers, which do not contain water and solvents |
EP2255860A1 (en) | 2009-05-30 | 2010-12-01 | Bayer MaterialScience AG | Device and method for removing gas from polycarbonate solutions containing solution |
EP2256146A1 (en) | 2009-05-30 | 2010-12-01 | Bayer MaterialScience AG | Extremely pure polycarbonate having good natural colour and thermal resistance and a device and method for production of same |
EP2255859A1 (en) | 2009-05-30 | 2010-12-01 | Bayer MaterialScience AG | Device and method for removing gas from polycarbonate solutions containing solution |
EP2255947A1 (en) | 2009-05-30 | 2010-12-01 | Bayer MaterialScience AG | Device and method for mixing polymer melts with additives |
MY159419A (en) | 2010-03-24 | 2017-01-13 | Arlanxeo Deutschland Gmbh | Process for the production of water and solvent-free halobutyl rubbers |
JP5604582B2 (en) | 2010-03-24 | 2014-10-08 | ランクセス・インターナショナル・ソシエテ・アノニム | Method for producing polymer free of water and solvent |
EP2368918A1 (en) | 2010-03-24 | 2011-09-28 | LANXESS Deutschland GmbH | Process for the production of water and solvent-free polymers |
SG183892A1 (en) * | 2010-03-24 | 2012-10-30 | Lanxess Int Sa | Process for the production of rubber ionomers and polymer nanocomposites |
EP2368917B1 (en) | 2010-03-25 | 2013-01-09 | LANXESS International SA | Process for the production of water and solvent-free hydrogenated nitrile rubbers |
PL2368916T3 (en) | 2010-03-25 | 2013-03-29 | Lanxess Int Sa | Process for the production of water and solvent-free nitrile rubbers |
SA112330882B1 (en) | 2011-09-28 | 2018-01-24 | ارلانكسيو دوتشلاند جى ام بى اتش. | Apparatus for removing volatiles from polymer-containing media |
TWI649180B (en) | 2013-04-04 | 2019-02-01 | 艾朗希歐德意志有限公司 | Method for removing volatile components from a self-containing elastomeric medium and de-volatile equipment for this purpose |
CN107849260B (en) | 2015-06-05 | 2021-08-10 | 沙特基础工业全球技术有限公司 | Method for dehydrating polymers and polymers made therefrom |
US10544259B2 (en) | 2015-08-31 | 2020-01-28 | Sabic Global Technologies B.V. | Polycarbonate with low chlorine content and a method of making and analyzing the same |
WO2019121248A1 (en) | 2017-12-18 | 2019-06-27 | Covestro Deutschland Ag | Method for producing a polycarbonate using an organic solvent based on chlorinated hydrocarbons |
Family Cites Families (16)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS5358965U (en) * | 1976-10-21 | 1978-05-19 | ||
US4260264A (en) * | 1979-05-21 | 1981-04-07 | The Japan Steel Works Ltd. | Biaxial vent extruder |
DE3206325C2 (en) * | 1982-02-22 | 1985-10-10 | AUTOMATIK Apparate-Maschinenbau GmbH, 8754 Großostheim | Multi-shaft, continuously working mixing and kneading machine for plasticizable materials |
JPS6031857B2 (en) * | 1982-06-28 | 1985-07-24 | 株式会社阪田商会 | Method for producing pigment dispersion |
JPS5931433U (en) * | 1982-08-23 | 1984-02-27 | 株式会社神戸製鋼所 | Deaerator for continuous twin-screw kneader |
US4474475A (en) * | 1982-12-30 | 1984-10-02 | Masao Moriyama | Mixing apparatus |
JPS59214631A (en) * | 1983-05-20 | 1984-12-04 | Japan Steel Works Ltd:The | twin screw extruder |
US4542992A (en) * | 1984-10-17 | 1985-09-24 | Usm Corporation | Continuous mixer |
JP2578479B2 (en) * | 1988-07-26 | 1997-02-05 | 帝人株式会社 | Method for producing polymer containing powder additive |
DE3841729C1 (en) * | 1988-12-10 | 1990-03-01 | Hermann Berstorff Maschinenbau Gmbh, 30627 Hannover | Single or twin screw extruders for degassing thermoplastic melts |
US5292186A (en) * | 1993-06-09 | 1994-03-08 | Kurimoto, Ltd. | Continuous kneading machine |
DE4402394B4 (en) * | 1994-01-27 | 2005-02-10 | Basf Ag | Process for dewatering water-moist graft rubber |
JP2905418B2 (en) * | 1994-04-18 | 1999-06-14 | 株式会社神戸製鋼所 | Kneading machine |
JPH08207118A (en) * | 1995-02-06 | 1996-08-13 | Japan Steel Works Ltd:The | Method for removing volatile substances from thermoplastic resin and vented twin-screw extruder |
JP3472391B2 (en) * | 1995-07-19 | 2003-12-02 | 東芝機械株式会社 | Twin screw extruder and extrusion method using the twin screw extruder |
JPH10180842A (en) * | 1996-12-25 | 1998-07-07 | Asahi Chem Ind Co Ltd | Highly kneading extruder and extrusion method using the kneader |
-
1999
- 1999-03-27 DE DE19914143A patent/DE19914143A1/en not_active Ceased
-
2000
- 2000-03-13 TW TW089104458A patent/TW548174B/en not_active IP Right Cessation
- 2000-03-14 US US09/937,467 patent/US6811294B1/en not_active Expired - Lifetime
- 2000-03-14 EP EP00914132A patent/EP1165302B1/en not_active Expired - Lifetime
- 2000-03-14 AU AU35557/00A patent/AU3555700A/en not_active Abandoned
- 2000-03-14 ID IDW00200102307A patent/ID30399A/en unknown
- 2000-03-14 WO PCT/EP2000/002240 patent/WO2000058072A1/en not_active Application Discontinuation
- 2000-03-14 BR BR0009367-0A patent/BR0009367A/en not_active IP Right Cessation
- 2000-03-14 CN CN00805518A patent/CN1119226C/en not_active Expired - Lifetime
- 2000-03-14 KR KR1020017012257A patent/KR20010108409A/en not_active Withdrawn
- 2000-03-14 JP JP2000607807A patent/JP4434497B2/en not_active Expired - Lifetime
- 2000-03-14 ES ES00914132T patent/ES2192521T3/en not_active Expired - Lifetime
- 2000-03-14 HK HK02107112.6A patent/HK1045665B/en not_active IP Right Cessation
- 2000-03-14 DE DE50001239T patent/DE50001239D1/en not_active Expired - Lifetime
Also Published As
Publication number | Publication date |
---|---|
DE50001239D1 (en) | 2003-03-20 |
EP1165302B1 (en) | 2003-02-12 |
ES2192521T3 (en) | 2003-10-16 |
JP4434497B2 (en) | 2010-03-17 |
BR0009367A (en) | 2001-12-26 |
JP2002539987A (en) | 2002-11-26 |
EP1165302A1 (en) | 2002-01-02 |
KR20010108409A (en) | 2001-12-07 |
AU3555700A (en) | 2000-10-16 |
HK1045665B (en) | 2004-05-14 |
ID30399A (en) | 2001-11-29 |
CN1345265A (en) | 2002-04-17 |
TW548174B (en) | 2003-08-21 |
HK1045665A1 (en) | 2002-12-06 |
US6811294B1 (en) | 2004-11-02 |
CN1119226C (en) | 2003-08-27 |
WO2000058072A1 (en) | 2000-10-05 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
EP1165302B1 (en) | Device and method for degassing plastics, especially polycarbonate solutions of high molecular weight | |
EP0087699B1 (en) | Multiaxial machine for continuously mixing and kneading plastifiable material, having intermeshing screws rotating in the same direction and at a constant distance between the axes | |
DE4117628C2 (en) | Process and apparatus for the production of starch melt and products obtainable by this process | |
EP0995567B1 (en) | Method for producing filled, modified and fibre reinforced thermoplastics and twin-screw-extruder for carrying out the method | |
DE102007051923B4 (en) | Apparatus and method for processing polymeric materials | |
DE3817941A1 (en) | EXTRUSION PROCESS AND SINGLE, TWO OR MULTI-SCREW EXTRUDERS | |
DE2304088A1 (en) | SCREW PRESS FOR EXTRUDING (EXTRUDING) NON-EXPANDABLE RESINS AND PROCEDURES FOR YOUR OPERATION | |
DE2446420C2 (en) | Screw extruder for processing plastics | |
EP2864104B1 (en) | Method for producing polymer pellets, extruded profiles or mouldings | |
DE2417865C2 (en) | Device for extruding plastic | |
EP1473137A1 (en) | Process for melting and homogenizing bimodal or multimodal polyolefins | |
DE102017004563A1 (en) | Degassing when extruding polymers | |
DE102007040645B4 (en) | Extruder, in particular planetary roller extruder with a vent | |
DE2043833B2 (en) | SCREW EXTRUSION PRESS FOR THE PROCESSING AND TREATMENT OF MELTS OF PLASTIC MATERIALS, PLASTIC POWDER AND GRANU LATEN | |
DE102006001171A1 (en) | Planet roller extruder comprises a side arm extruder to which a vacuum can be applied for degassing | |
DE4114541C2 (en) | Degassing extruder | |
DE102012008169A1 (en) | Planetary rolling construction or modular structured extruder for processing plastic material in e.g. food industry for manufacturing brush, has tooth ends exhibiting slant that is more steep than that of slant of flanks to gear diameter | |
DE4137969C1 (en) | ||
EP2580042A1 (en) | Device for processing material by mixing and/or plasticating | |
WO2018108349A1 (en) | Delivery pump for a polymer melt, extrusion device and method for filament production | |
EP0490361A1 (en) | Extruder for difficult-to-mix extrudate | |
EP0490360B1 (en) | Method and extruder for the processing and the manufacture of rubber and plastic materials | |
DE102004007479B4 (en) | Method and device for processing at least two materials into a product | |
DE1595735A1 (en) | Device for the production of macromolecular synthesis products | |
DE19852493B4 (en) | Extruder with degassing |
Legal Events
Date | Code | Title | Description |
---|---|---|---|
OP8 | Request for examination as to paragraph 44 patent law | ||
8131 | Rejection |